title: Factors related to tooth loss among community-dwelling middle-aged and elderly Japanese men.
abstract: BACKGROUND
  Using data from a large-scale community-based Japanese population, we attempted to identify factors associated with tooth loss in middle-aged and elderly men.
  
  
  METHODS
  A total of 8352 men aged 40 to 79 years who lived in the north of the main island of Japan and underwent health checkups were enrolled between 2002 and 2005. Number of teeth was assessed by the question, "How many teeth do you have (0, 1-9, 10-19, or ≥20)?". On the basis of the answer to this question, participants were classified into 2 groups (≤19 teeth or ≥20 teeth). Using multivariate logistic regression, factors related to having 19 or fewer teeth were estimated.
  
  
  RESULTS
  The numbers (percentages) of participants who had 0, 1 to 9, 10 to 19, and 20 or more teeth were 1764 (21.1%), 1779 (21.3%), 1836 (22.0%), and 2973 (35.6%), respectively. Among the participants overall and those aged 65 to 79 years, having 19 or fewer teeth was significantly associated with older age, smoking status (current smoking and ex-smoking), and low education level. In addition, men with 19 or fewer teeth were more likely to have a low body mass index and low serum albumin level and less likely to be current alcohol drinkers. Among men aged 40 to 64 years, but not men aged 65 to 79 years, those with 19 or fewer teeth were more likely to have a low serum high-density lipoprotein cholesterol level and high glycosylated hemoglobin (HbA1c) level.
  
  
  CONCLUSIONS
  Smoking, low education level, and poor nutritional status were associated with tooth loss among middle-aged and elderly Japanese men.
authors.affiliation: Department of Hygiene and Preventive Medicine, School of Medicine, Iwate Medical University, Yahaba, Iwate, Japan. andoa@iwate-med.ac.jp
authors.forename: Ayumi
authors.initials: A
authors.lastname: Ando
authors.forename: Masaki
authors.initials: M
authors.lastname: Ohsawa
authors.forename: Yumi
authors.initials: Y
authors.lastname: Yaegashi
authors.forename: Kiyomi
authors.initials: K
authors.lastname: Sakata
authors.forename: Kozo
authors.initials: K
authors.lastname: Tanno
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Onoda
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Itai
authors.forename: Fumitaka
authors.initials: F
authors.lastname: Tanaka
authors.forename: Shinji
authors.initials: S
authors.lastname: Makita
authors.forename: Shinichi
authors.initials: S
authors.lastname: Omama
authors.forename: Kuniaki
authors.initials: K
authors.lastname: Ogasawara
authors.forename: Akira
authors.initials: A
authors.lastname: Ogawa
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Ishibashi
authors.forename: Toru
authors.initials: T
authors.lastname: Kuribayashi
authors.forename: Tomiko
authors.initials: T
authors.lastname: Koyama
authors.forename: Akira
authors.initials: A
authors.lastname: Okayama
mesh_terms: D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D006801:Humans; D057187:Independent Living; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D012307:Risk Factors; D011795:Surveys and Questionnaires; D016388:Tooth Loss / Q000453:epidemiology*